Fuel injection pump for an internal combustion engine having pre

Details Fuel injection pump for an internal combustion engine having pre Fuel injection pump for an internal combustion engine having pre

1989-02-22

1990-12-04

Smith, Leonard E.

Pumps

Expansible chamber type

Pumping member position controlled port

417499, 123299, 123300, F04B 704, F02M 4506

Patent

active

049750291

ABSTRACT:
A fuel injection pump for an internal combustion engine includes at least one pump piston movably disposed in a piston sleeve which piston sleeve is fitted in a pump housing. A first arrangement associated with the piston draws fuel through suction ports into a working chamber of the pump during a piston suction stroke. A second arrangement associated with the piston cuts off a connection to a suction side of the pump and thereafter initiates a delivery from the working chamber to an injection nozzle, which delivery is divided into two phases. The second arrangement is operable during a piston delivery stroke. A third arrangement controls the phases and includes the suction ports and an inside edge of the piston sleeve. The inside edge of the piston sleeve is provided on a planar end face of a guide bore of the sleeve and faces the working chamber.

REFERENCES:
patent: 2420164 (1947-05-01), Bremser
patent: 2871796 (1959-02-01), Dreisin et al.
patent: 3438359 (1969-04-01), Thoma
patent: 4617894 (1986-10-01), Kampichler

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